Is this a good setup for street/haulin' butt?

We sort of went off track on a related thread, so I figured I should start this new, more specific question on the appropriate category...

The reason I posted this thread is because my Dad said that the setup we've installed in my Dart will make about 400+ hp...

Was hoping to be able to generally figure this out just by the setup and car, originally.
Now I just want to know what's good and bad about it, and if it will fit my needs...
(It's already built mostly, just finishing electrical and such, and then interior etc. but slight changes can be made like rear gearing)

Its a 383, 727, 8 3/4, 742 posi, 323 gears in rear atm, and I have 2800 stall, and 27 diameter rear tires...
With 750 edelbrock carb, Street dominator holly aluminum intake, stealth aluminum heads (just looked over and squared), light weight anything possible (aluminum radiator and water pump housing, etc), Comp Cam 268 extreme energy (4.88 lift/hydraulic), 9.1 - 9.3 compression (current estimation), stock gaskets, etc...

Is this a good street setup for my '70 Dart? I will probably raise the compression by a few methods later on, but this will be how she sits for now...
ummmm......... yeah. It's a big block..... It gonna be good. I can't say how much HP or if you'll hit your 400 goal but I dont see much reason you wont.